Annealing leer



J. KZ. BLAH@ ANNEALI NG LEER Filed Jan. 13, 1925 INVE NT DE- domes Blom AT T E; HNEY.

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llmatented hunn ld, l y i ltthl'hll'ldhlhllllli LEER.

.application 'tiled January 13, 19%. lleral 11o. tutti llhe present invention relates to an annealing leer, and has particular reference to a well adapted tor the annealing ol' sheet glass.

ein important object ot the invention is to provide a sheet glass annealing leer wherein the sheet to be annealed passes through a plurality of zones.

A. it'urther object of the invention is V'to provide a sheet glass annealing leer wherein a plurality of bam'e plates are arranged within the leer and above the sheet, the said baille plates depending from the top ot the leer to create a plurality ot zones.

fl further object oit the invention is to provide a leer of this nature wherein a plurality ot bame plates depend from the top ot the leer, the heme plates being progressively shorter trom the hot end ot the leer toward the cold end thereot.

h still further object ot the invention is to provide a sheet glass annealing leer including means whereby a sheet ot glass may be supported and passed therethrough, the leer including a plurality ot bame plates, which may be adjustable, depending from the top of the leer and varying in heights, the bames dividing the upper portion ot the leer into a plurality ot Zones, said leer also including means tor heating the same in the lower part or that portion beneath the sheet.

tlther objects and advantages oit the invention will become apparent during the course oit the following description.

lin the drawings wherein lihe numerals are employed to designate like parts throughout the same,

1 is a vertical longitudinal section ol" atleer termed in accordance with my invention,

lllig., E); is a section talren on line 2-l in hlig. 1, and

Figs. 3, 4f and 5 are fragmentary sectional views ot slightly modiiied torms ot, construc- Ein the production of glass articles, including sheet glass, it is necessary, after the articles have been formed, to subject 'them suitable annealing temperatures.` ln sheet glass machines this is accomplished hy passing the sheet ot glass through an annealing leer.

lhe type oit leer shown inthe drawings is similar to the leer used on the Colburn machine, which. is more specifically forth in the lGolburn Patent 1,2al8,tl09, granted December l, 1917. ln this patent a sheet ot glass is drawn trom a draw-pot. llt is detlected over a bending member, passed over a flattening table and through an annealing leer. The leer at the end which the sheet enters is known as the hot end, and is relatively much hotter than the opposite end which is known as the cutting table end. The temperature ot the leer is gradually reduced so that the sheet which is formed from molten glass ot a high temperature is gradually reduced to room temperatures to relieve strains, etc.

rllhe present application has particular reference to a new term oit annealing leer.

ln the drawings the numeral 10 designates the drawing chamber which includes the iiattening table 11 and draw bar arrangement l2, both of which constructions are shown diagrammatically. llFhe annealing leer 13 is provided with a plurality o1. rotatable rolls 14 which support and convey the sheet ot glass 15 through the leer. 'llhe end 1G is the hot end-v and the end 17 is the cutting table end. 'llhe length ot the leer 13 may vary, although ordinarily it will range between 200 to 300 teet. The sheet 15, after being annealed, is passed out upon a table 18 where it may be cut into the desired lengths.

ln accordance with the present invention a plurality of bande plates 19 are arranged within the leer and are adapted to dependtroin the top 20 of the leer. 'llhe brumes may be of any desired material and are arranged to divide the leer into a plurality of sones. 'lhe battle plates become progressively shorter troni the hot end 16 toward cutting table end 17. With this arrangement the hrst few compartments are more or less distinct, their borders being clearly dehined by the bathe plates, while the other compartments are divided but slightly.

Arranged beneath the sheet, and especially at the hot end 16, are a plurality oit heating means 21 which may be in the torna ont burners, electrical resistance units, etc.

lin Fig. l the battle plates 19 are shown as being rigid, while in Figs. 3, d and fi, 'they are adjustable., ln Fig. 8 t-he halide coinprises the sections and 23, the section being rigidly associated with the top 20 and having means whereby the section 23 may he pivotally supported thereby. operating llll dll

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lldtl Mtl lever 24 may be used to adjust the angularity of the lower section 23, while a. clamping member 25 may be used to maintain the desired adjustment.

In Fig. 4 the baiile 26 is operable through an opening 27, by which means a cable or the like 28 may be used to elevate or lower the baille to attain the proper position. In Fig. 5 the baile 29 is in the form of a butterfly valve and is operable through means of the lever 30.

Of course there are a great vmany other forms of modifications which could be used, and therefore it is to be understood that I do not wish to limit myself to the articular type of baile plate to be used. he invention resides in the fact that the annealing leer is divided into a plurality of zones of different temperatures by means of battle plates, the baffle plates being preferably but not necessarily arranged so that they become progressively shorter from the hot end of the leer toward the cutting table end. With this type of apparatus the annealing of the glass sheet can be accurately controlled, thus reducing to a minimum breakage within the leer during the annealing period. f

It is to be understood that the forni of the .invention herewith shown and described is to be taken as the preferred embodiment of the same, and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims.

' Claims:

1. In sheet glass apparatus, an annealing leer, a plurality of baffles therein ositioned at one side of the sheet and heating means also within the leer at the opposite side of said sheet.

2. In sheet glass apparatus, an annealing leer, a plurality of baiiies therein positioned at one side of the sheet, said baliles varying in heights and heating means also within the leer at the opposite side of said sheet.

3. In sheet glass apparatus, an annealing leer, means at one side of the sheet for dividing said leer into a plurality of zones, and heating means also within the leer at the opposite side of said sheet.

4. In sheet glass apparatus, an annealing leer, a plurality of ba-lles arranged therein atone side of the sheet for dividing said leer into a plurality of zones, and heating means also within the leer at the opposite side of said sheet. V.

5. In sheet glass apparatus, an annealing leer, a plurality of various sized baffles arranged therein at one side of the sheet for dividing the leer into a plurality of zones,

and heating means also within the leer at the opposite side of the sheet.

6. Y sheet glass apparatus, an annealing leer, a plurality of batlles arranged therein and depending from the top of the leer and burners also within the leer and positioned beneath the sheet.

7, In sheet glass apparatus, an annealing leer, meansfor supporting a sheet therein, a pluralit of bales arranged above the sheet for ividing the leer into zones and a plurality of burners arranged within the leer beneath said sheet.

8. In sheet glass apparatus, an annealing leer, means for' supporting a sheet therein, a pluralit of baiiles arranged above the sheet for ividing the leer into lengths, the battles varying Iin lengths and burners arranged within the leer beneath said sheet.

9. In sheet glass apparatus, an annealing leer, means for supporting a sheet therein, a plurality of batiies arranged above the sheet and being progressively shorter from the hot end of the leer toward the cold end thereof and a plurality of burners arranged within the leer beneath said sheet.

10. In sheet glass apparatus, an annealing leer, means for supporting a moving sheet therein, a plurality of bailie plates arranged above the sheet and depending from the top of said leer, and adapted for separating the leer into zones said baffles being progressively shorter from the hot end toward the cold end of the leer and a .plurality ot burners arranged within the leer beneath the sheet and positioned at spaced points longitudinally of said leer.

11. In sheet glass apparatus, an annealing leer, means for supporting a movingsheet of' glass therein, a plurality of adjustable baiiie plates therein for dividing the leer into zones above the sheet, and heating meansl beneath the sheet for supplying heat to said zones.

12. The process of annealing sheet glass, consisting in passing the sheet through a leer comprising a plurality of heated cour partments above the sheet, the temperature ot the compartments being controlled by heating means beneath the sheet and being progressively lower from the end of the sheet enters the leer toward the end the sheet leaves the leer.

13. The process of annealing glass consisting `in passing the glass horizontally through an annealing oven divided above the glass into a plurality of zones supplied with heat from means beneath said glass.

Signed at Toledo, in the county of Lucas, and State of Ohio, this 9th day of January,

JAMES C. BLAIR.

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Patent No. l, 6552 935. Granted January l0, 19255, fio

JAMES C. BLAIR.

It is hereby oomiioo @mi error appear@ in me printed specification of @no above numbezo paizom vequamg correoion as *foowsz Page-2, line 113, "oa 12, strik@ om me word "of"; and hat ih@ @and Lowers Patent should be food wih his'oomeoion marmein that the sam@ may conform to the record of tho case in the Paon 'oe.

Signed and seaod is NM1 day of Apr? A.. Y* i928.

M. J. Moore, Amg Commissioner of Paoms,

(Seal) 

